Number Base Converter
Convert between binary, octal, decimal, and hexadecimal.
Number Base Converter
Binary (2)Octal (8)Decimal (10)Hexadecimal (16)
About Number Base Converter
Convert numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) instantly. This tool uses BigInt for arbitrary-precision arithmetic, so it handles very large numbers without losing precision. All conversions happen locally in your browser — nothing is sent to a server. Hexadecimal output uses uppercase letters (A-F) for readability.